CVE-2021-0920In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition.
Updated under an hour ago ()
Does this affect you?
It affects linux_kernel and 2 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since May 23, 2022; federal agencies had to remediate by Jun 13, 2022. Treat that date as your deadline.
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Free account, 1 product
In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel
- CVSS
- 6.4 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-416
- Known exploited
- Added to CISA KEV May 23, 2022; federal remediation due Jun 13, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 0.87% (percentile 58)
- Assigned by
- google_android
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
linux linux_kernel linux:linux_kernel | through 5.13; 5.14; 5.14; 5.14 | NVD |
google android google:android | all versions | NVD |
debian debian_linux debian:debian_linux | 9.0 | NVD |
References
- https://source.android.com/security/bulletin/2021-11-01x-refsource-misc, vendor-advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.htmlmailing-list, x-refsource-mlist, third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-0920third-party-advisory, us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.